Improvement in sewing-machines



L. HALL.

Sewing Machine. No. 43,404.-

Wissels.

N. PETERS. PhowLkhugmphen wmnmgmn, u. u,

Patented Julyy Ez,i i864;

Ira/e 112m" www VUNITED STATES PATENT OFFICE.

LUTHER HALL, OF BOSTON, MASSACHUSETTS, ASSIGNOR T() ALFRED B. ELY, OF'SAME PLACE.

, IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters jPatent No. 43,404, dated July 5,1864.

To all whom it may concern.-

Be it known that I, LUTHERHALL, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in` Sewng-Machines; and I do hereby declare that the following is a full, clear, f and exact description ot' the construction and;

Like parts are indicated by the same letters in Iall the drawings.

The nature ot' my invention consists, first, in seizing the needle-thread and carrying it around the under spool and spool-case by means of a hook constructed and arranged as hereinafter described, whereby the shuttle-stitch is made without a shuttle, and I am enabled'to use for the under thread an ordinary commercial spool; and, second, in the employment of a spool-case holder or bracket, M, with an opening in its side, so constructed and arranged that while it retains the spool in place it will receive the distended loop of 'the needle-thread presented by the hook to be passed under and around the spool.

To enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

A is the table, constructed like those in general use for a similar purpose.

B is the bent arm or goose-neck, in the vertical front C of which plays the needlebar L.

J is a bent lever or pitman vibrating on the fulorum 7', one end of said lever being attached to the needle-bar and the other passing through a slot in the rear of the table, as shown in Figs. 1 and 2.

K is a vertical shaft, to the bottom ot' which is attached the usual pressure-foot, said shaft being depressed by a spring and raised by a lever, as represented in Fig. 3.

R is the upper spool.

T is the tension apparatus, like that on many other machines.

Gis an iron wheel, fast to the inner end of the axle D, which turns in bearings in the studs Q Q, the latter being confined to the bottom of the table A by means ot' screws, as shown in Figs. 1 and 3. Y

E is the driving-pulley, fast to the shaft D, the inside of said pulley, as shown in Figs. l and 3, being furnished with a cam, by means ot' which the feed-bar (represented by dotted lines in Fig. 3) is driven forward, the same be* ing thrown back by a spring in the usual manner.

Fast to theside of the wheel G is an eccentric wheel, P. (Shown bydotted lines in Fig. 2.)

F is a pitman, one end of which encircles the eccentric P, the other end being attached to the bottom of the lever J, by means of which the latter is made to vibrate. o t

H is the eccentric-hook, (the shape of which is show n in Figs. 1, 2, and 3,) attached to the side of the wheel G by means of the pin h, on which it turns.

I is a rod, one end of which is pivoted to the lever J and the other to the shank of the hook H, as shown in Fig. 2, the object of said rod I being to guide the hook H and keep the same in a-vertical or approximately vertical position.

The toe of the hook, as shown in Figs. `l, 2, and 3, is nearly' a triangle, the two sides of which are slightly curved. The top of this toe is slightly convex, the under side being nearly flat, and provided (see Fig. 1) with a cleat about one-eighth of an inch thick,having its side toward the point of the toe beveled under, so as to form a hook-shoulder to catch. the loop formed by the needle-thread and hold the same till it has carried it past the center of the bottom of the spool-case N.

U is a start or hanger, confined to the bottom of the table by means of screws, as shown in Figs. 1, 2, and 3.

N is the spool-case, of brass or other suitable material, the bottom part of which is hemisphericahand so constructed as to lit into the lower end of the cylindrical case, like a boxcover, as represented in the vertical section, Fig. 5. To the side of the case N, and extending nearly its whole length, is soldered or otherwise fastened a triangular piece, c, (see Fig. 4,) the object of which is to assist in dividing the needle-loop While expanded and carried round by the hook H. The top of the spool-case is also provided with a horn or pro. jection, b, (see Fig. 5,) through the upper end of which is a hole, whereby the thread from the spool Sl is guided clear of the hook, there being a hole or holes, c, in the case for the thread to pass from said spool to the hole bin the horn. This horn also tends to keep the spool-case from turning in ils holder bythe draft of the hook H.

M is the spool-case holder or bracket, the general sha-pe of which is clearly shown in Figs. l, 3, 4, and 5. This holder` or bracketis made of brass or other suitable material, bent or cast into the form of a cylinder, with an opening in the side sufficiently wide to receive the triangular strip a, Fig. 4, and the distended loop of the needle-thread, presented by the hook H, to be passed under and around the spool-case N. The contiguous side edges of the holder shouldliare outward a little, as represented in Fig. 4. rIhe top of the holder, as shown in Fig. 3, is partially covered to prevent the spool-case N from rising up too high and turning round. rlhe lower edge of the holder is provided with a horizontal arm or continuation, through which is a hole, m, to

yreceive a screw which enters the cleat, V, the

latter, as shown in Fig. 2, being also confined by a screw to the start U. The inside diameter of the holder M, as shown in Figs. 4 and 5,

is alittle larger than the spool-case, so that there may be sufficient space between the two lfor the needle-loop to pass without obstruc- N rests upon the free end of the strip O, andA is thereby supported, excepting when raised by the hook passing under it, with the exi pandedloopfrom theneedle. Thusconstructed,

it is obvious that the point of' the hook will enter theloop formed by the needle, gradually expand the same, and early it down under the spool-case, leaving it (the loop) to be drawn up by the needle, thus forming the shuttlestitch by means of two substantiallystationary spools of'the ordinary size.

My machine is very simple in construction, rapid and comparatively noiseless in operation, and saves the trouble of winding thread from spools to shuttle.

Having thus described the construction and operation ofmy invention, what I claim as new,

and desire to secure by Letters Patent, is-

1. Seizing the needle-thread and carryingit around the under spool, S, and spool-case N by means of the hook H, 'constructed and arranged substantially as described.

2. The spool-case holder or bracket M, with a lateral opening, so constructed and arranged that while it retains the spool in place it will receive the distended loop of the needle-thread when seized and presented by the hook H, to

be passed under and around the spool, substantially as described. l

case holder M, the vspool-case N, with its horn .i b and spool S, substantially asl set forth and for the` purpose described.

LUTHER HALL.

Witnesses:

W. M. PARKER, JOSEPH FREEsE. 

